Method of making cast-iron articles.



.' describe.

UNITED STATES PATENT oFF cE.

ALEXANDER .W. SLOCUM, OF.PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TCHARLESY. SLOCUM, OF PITTSBURG, PENNSYLVANIA.

METHOD- OF MAKING. .CAJST-TIRON ARTICLES.

Specification of Letters Patent.

Patented Sept. 11, 1906.

Application filed February 12.1903. Serial No. 143.095.

To all whom it may concern:

Be it known that I, ALEXANDER W. SLO- CUM, of Pittsburg Alleghenycounty, Pennsylvania, have invented a new and useful Improvement in. theMethods of Making Cast-Iron Articles, of which the following is aspecification.

I have discovered that cast-iron car-wheels can be producedhavinggreatly-increased hardnessand toughness, and therefore I of greater.durabilit by'combinin rutile with the cast-iron in t e manner whic Iwill now In the practice of my invention I take the cast-iron when ithas been delivered from the cupola-furnace into a ladle and then Whileit is at or below the temperature. at which it is delivered ITOII'Kfi-hGcupola I introduce into it rutile-an oxid of titaniumpreferabl in theproportion of one per cent. or less 0 the weight of the iron. I may addthe rutile by placin it in a paper box or package of any suitab ematerial, pushing it with an iron or steel rod or other article suitablefor the purpose to the bottom of the ladle, and then with t e iron. Thecarbon or other meta loids of the cast-iron reduce the titanium oxid andproduce metallic titanium, which alloys with the iron, giving thedesired result. The .iron is then cast into wheel molds.

The discovery that the titanium may be the carmade to alloy with theiron at temperatures at or below that at which it leaves the cupolagreatly decreases the 'cost of such alloys and renders them commerciallyavailable in the casting of comparatively small articles.

The proportion of rutile addedto the iron and the manner of introducingit may be varied, since What I claim is+ 1. The method of makingcast-iron articles which consists in tapping the molten cast-iron from amelting-furnace, and while it is at or 'below the temperature at whichit was delivered from said furnace, mixing titanium oxid therewith,whereby the oxid is reduced by the carbon content of the iron, and thencasting the article, substantially as described.

2. The method of making cast-iron articles which consists in ta ping themolten castiron from a meltingrnace, and while it is at or belowthetemperature at which it was delivered from said furnace, incorporating;

therewith one per cent. or less, of titanium oxid, allowing the carboncontent of the iron to reduce the oxid, and then casting the'article;substantially as described.

In testimony whereof I have hereunto set my hand.

ALEXANDER W. SLOCUM.

Witnesses:

L. M. REDMAN, H. M. 001mm.

